Chromium (skia) doesn't do -webkit-border-image correctly when the border image is 1 pixel wide or high, since it doesn't like negative width/height source rects in Image::drawPattern(). CoreGraphics will happily draw it in this case. See bug http://crbug.com/6167.

(In reply to comment #2)
> Putting Brett as the reviewer doesn't make much sense as Brett is not a WebKit
> reviewer.
Whoops, will fix.
> We don't typically nominate a specific reviewer anyway.
In my experience, patches tend to get ignored if you don't.